Graph

Country
Migration site
Species
Period    
Sex
Age
Plumage
Present
Favourites

Year Totals Observation hours
1900 36 5:30
1980 0 2:00
1981 8 143:25
1982 81 100:04
1983 2 76:05
1984 197 157:55
1985 13 193:05
1986 47 180:40
1987 4 99:15
1988 56 216:00
1989 67 269:46
1990 119 262:45
1991 1391 405:47
1992 330 645:00
1993 285 397:58
1994 443 286:00
1995 26 224:45
1996 134 325:15
1997 79 356:45
1998 70 339:30
1999 55 267:15
2000 48 261:30
2001 146 524:35
2002 449 526:15
2003 225 567:15
2004 79 455:05
2005 470 601:15
2006 113 389:55
2007 96 432:55
2008 344 525:55
2009 154 399:05
2010 28 249:40
2011 147 319:15
2012 148 231:35
2013 142 270:55
2014 33 291:35
2015 66 177:30
2016 74 230:15
2017 163 250:05
2018 70 318:16
2019 198 584:19
2020 195 587:17
2021 131 563:27
 
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